Fix doctest

src/python_spectrometer/__init__.py

@@ -161,21 +161,21 @@ the filter properties using the spectrometer:
 >>> from qutil.functools import partial
 >>> from python_spectrometer import daq, Spectrometer
 
->>> def compare_filters(type: str, order: int):
+>>> def compare_filters(typ: str, order: int):
 ...     spect = Spectrometer(daq.QoptColoredNoise(), savepath=mkdtemp(),
-...                          plot_dB_scale=True, plot_density=False)
+...                          plot_dB_scale=True, plot_density=False,
+...                          threaded_acquisition=False)
 ...     spect.take('Baseline', n_seg=10, fs=1e4, df=0.1)
-...     spect.procfn = getattr(sp.real_space, f'{type}_filter')
-...     spect.take(f'Real space {order}. order {type} filter',
+...     spect.procfn = getattr(sp.real_space, f'{typ}_filter')
+...     spect.take(f'Real space {order}. order {typ} filter',
 ...                n_seg=10, f_max=1e2, fs=1e4, df=0.1, order=order)
 ...     spect.procfn = sp.real_space.Id
 ...     spect.psd_estimator = partial(
 ...         sp.real_space.welch,
-...         fourier_procfn=getattr(sp.fourier_space, f'{type}_filter')
+...         fourier_procfn=getattr(sp.fourier_space, f'{typ}_filter')
 ...     )
-...     spect.take(f'Fourier space {order}. order {type} filter',
+...     spect.take(f'Fourier space {order}. order {typ} filter',
 ...                n_seg=10, f_max=1e2, fs=1e4, df=0.1, order=order)
-...     return spect
 
 RC and Butterworth first order filters are the same (up to real-space
 implementation):